Portrait Study of W.P. Nicholson, lithograph portrait of William Nicholson by James Pryde, published in The Studio, December 1897

Sir William Newzam Prior Nicholson (5 February 1872 – 16 May 1949) was an English painter of still-life, landscape and portraits, also known for his work as a wood-engraver, illustrator, author of children's books and designer for the theatre.

In the spring of 1893 Nicholson eloped with Mabel Pryde,[6] whom he had by then known for four years; they were married in Ruislip on 25 April.[7][8] The couple went to live in what had been a pub, the Eight Bells at Denham, Bucks.[9] They were soon joined by Mabel's brother James, and not long after by Ellen Terry's son Edward Gordon Craig and his wife May, who had also recently eloped and married. Nicholson received an annual allowance of £150 from his father.[10] William and Mabel Nicholson had four children: the celebrated painter Ben (1894–1982); Anthony (1897–1918), who died of wounds in France during the First World War; Annie Mary "Nancy" (1899–1978), artist and wife of the poet Robert Graves; and the architect and designer Christopher "Kit" (1904–1948). Mabel died in July 1918 in the Spanish flu epidemic, and Anthony died soon afterwards.[3]

From about 1910 until he remarried in 1919, Nicholson's housekeeper Marie Laquelle, whose real name was Adèle Marie Schwarz, née Schiestel, was also his mistress. Nicholson painted her several times, first as Carlina in 1909; he also painted her daughter Georgette and her second husband Norman Holder.[5]

In October 1919 Nicholson married Edith Stuart-Wortley, widow of Sir John Stuart-Wortley, and who, under the name Elizabeth Drury, was also a painter.[11] Nicholson had painted her in the previous year as Lady in Grey.[8] Their daughter Liza was born in 1920.[3] Edie had two children from her previous marriage, and Nancy's daughter Jennie had been born the previous year. Nicholson's books for children all date from the 1920s.

From 1935 until his death, Nicholson's companion was the novelist Marguerite Steen. According to Steen, they met in Andalucia in May 1935, and by mid-June were living together at Nicholson's mews studio in Apple Tree Yard, off Jermyn Street. Nicholson had been separated from Edie for some years, but they remained on good terms; although she promised to give him a divorce, she never did so.[12]

From 1893 to 1898 Nicholson collaborated with his brother-in-law James Pryde on poster design and other graphic work including signboard painting and book illustration. They called themselves the Beggarstaffs, or J. & W. Beggarstaff; in recent times they have been referred to as the Beggarstaff Brothers, although they did not use this name.[13]

Nicholson provided illustrations and cover designs for several of the early books of his brother-in-law Robert Graves. He supplied the illustrations for The Velveteen Rabbit, a book for children by Margery Williams (1922). He wrote and illustrated two books for children, Clever Bill (1926) and The Pirate Twins (1929), both published by Faber & Faber.

An Almanac of Twelve Sports. Verses by Rudyard Kipling, illustrations by William Nicholson. London: William Heinemann, 1897.

Almanach de douze sports 1898. Illustrations by William Nicholson, text by Octave Uzanne (Kipling's verses were not used in the French edition). Paris: Société française d'éditions d'art, [1898].

London Types. Quatorzains by William Ernest Henley, illustrations by William Nicholson. London: William Heinemann; New York: R.H. Russell, 1898.

Tony Drum: a Cockney Boy. Edwin Pugh, ten coloured plates from designs by the Beggarstaff Brothers (five by Nicholson, five by James Pryde). London: William Heinemann; New York: Henry Holt and Company, 1898.